1427642

Information

• Patent Grant
• 1427642

• References
• Source

• Patent Number

  1,427,642

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1922
  103 years ago

• CPC

  • E04C3/005 - Girders or columns that are rollable, collapsible or otherwise adjustable in length or height
  • E06C5/30 - formed of links which reinforce themselves against each other
  • Y10T74/19902 - Screw and nut

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 059 - Chain, staple, and horseshoe making
  • 074 - Machine element or mechanism
  • 182 - Fire escape, ladder, or scaffold